Urea SCR system is well known technology to reduce NOx from diesel engine. In Korea, Vanadium SCRs have been used in heavy-duty commercial vehicles with introducing EURO-4. As vanadium is regarded as the material of causing cancer, Zeolite SCR would b...
Urea SCR system is well known technology to reduce NOx from diesel engine. In Korea, Vanadium SCRs have been used in heavy-duty commercial vehicles with introducing EURO-4. As vanadium is regarded as the material of causing cancer, Zeolite SCR would be technical alternative to meet next regulation stage. In this study, NOx reduction characteristics have been compared between Vanadium and Fe-Zeolite SCR depending on some parameters like space velocity, NO2/NOx ratio, NH3 concentration, etc. The tested vanadium and Fe-Zeolite SCR have similar tendency in NOx reduction as above parameters, but show quite different performance characteristics in low temperature.